Main Content

Mapped Core Engine

Steady-state core engine model using lookup tables

expand all in page
  • Mapped Core Engine block

Libraries:
Powertrain Blockset / Propulsion / Combustion Engine Components / Core Engine

Description

The Mapped Core Engine block implements a steady-state core engine model using power, air mass flow, fuel flow, exhaust temperature, efficiency, and emission performance lookup tables. You can use the block for:

  • Hardware-in-the-loop (HIL) engine control design.

  • Vehicle-level fuel economy and performance simulations.

The block enables you to specify lookup tables for these engine characteristics. The lookup tables are functions of engine load, L, and engine speed N. If you select Input engine temperature, the tables are also a function of engine temperature, T.

  • Power

  • Air

  • Fuel

  • Temperature

  • Efficiency

  • Emissions

    • Hydrocarbon (HC)

    • Carbon monoxide (CO)

    • Nitric oxide and nitrogen dioxide (NOx)

    • Carbon dioxide (CO2)

    • Particulate matter (PM) emissions

To bound the Mapped Core Engine block output, the block does not extrapolate the lookup table data.

Ports

Input

expand all

Engine load, L. Examples of engine load include:

  • Commanded torque

  • Commanded indicated mean effective pressure (IMEP) in the engine cylinder

  • Normalized cylinder air mass

  • Injected fuel mass

Dependencies

To specify an engine load port name, on the Configuration tab, enter a name in the Load input port name parameter field.

Engine speed, N.

Dependencies

To specify an engine load port name, on the Configuration tab, enter a name in the Speed input port name parameter field.

Engine temperature, T.

Dependencies

To create the engine temperature input port name, select Input engine temperature parameter field.

To specify an engine load port name, on the Configuration tab, enter a name in the Temperature input port name parameter field.

Output

expand all

Engine power, Tbrake.

Dependencies

  • To create this port, on the Configuration tab, select Power.

  • To specify the port name, on the Power tab, enter a name in the Power output port name parameter field.

Engine air mass flow, m˙intk.

Dependencies

  • To create this port, on the Configuration tab, select Air.

  • To specify the port name, on the Air tab, enter a name in the Air output port name parameter field.

Engine fuel flow, m˙fuel.

Dependencies

  • To create this port, on the Configuration tab, select Fuel.

  • To specify the port name, on the Fuel tab, enter a name in the Fuel output port name parameter field.

Engine exhaust temperature, Texh.

Dependencies

  • To create this port, on the Configuration tab, select Temperature.

  • To specify the port name, on the Temperature tab, enter a name in the Temperature output port name parameter field.

Brake-specific fuel consumption (BSFC), Eff.

Dependencies

  • To create this port, on the Configuration tab, select Efficiency.

  • To specify the port name, on the Efficiency tab, enter a name in the Efficiency output port name parameter field.

Hydrocarbon emissions, HC.

Dependencies

  • To create this port, on the Configuration tab, select HC.

  • To specify the port name, on the HC tab, enter a name in the HC output port name parameter field.

Carbon monoxide emissions, CO.

Dependencies

  • To create this port, on the Configuration tab, select CO.

  • To specify the port name, on the CO tab, enter a name in the CO output port name parameter field.

Nitric oxide and nitrogen dioxide emissions, NOx.

Dependencies

  • To create this port, on the Configuration tab, select NOx.

  • To specify the port name, on the NOx tab, enter a name in the NOx output port name parameter field.

Carbon dioxide emissions, CO2.

Dependencies

  • To create this port, on the Configuration tab, select CO2.

  • To specify the port name, on the CO2 tab, enter a name in the CO2 output port name parameter field.

Particulate matter emissions, PM.

Dependencies

  • To create this port, on the Configuration tab, select PM.

  • To specify the port name, on the PM tab, enter a name in the PM output port name parameter field.

Parameters

expand all

Configuration

Type of mapped internal combustion engine image to use in the block.

Engine load input port name.

Breakpoints for engine load input.

Speed input port name.

Breakpoints for engine speed input.

Temperature input port name.

Dependencies

To enable this parameter, select Input engine temperature.

Breakpoints for engine temperature input.

Dependencies

To enable this parameter, select Input engine temperature.

Create the output ports.

Dependencies

The table summarizes the output ports that are created for each Output parameter selection.

Output SelectionCreates PortCreates Tab
PowerEngTrqPower
AirIntkAirMassFlwAir
FuelFuelMassFlwFuel
TemperatureExhManGasTempTemperature
EfficiencyBsfcEfficiency
HCEoHCHC
COEoCOCO
NOxEoNOxNOx
CO2EoCO2CO2
PMEoPmPM

Power

Power output port name.

Dependencies

To create this parameter, on the Configuration tab, select Power.

Power table.

Dependencies

To create this parameter, on the Configuration tab, select Power.

Air

Air mass flow output port name.

Dependencies

To create this parameter, on the Configuration tab, select Air.

Air mass flow table.

Dependencies

To create this parameter, on the Configuration tab, select Air.

Fuel

Fuel output port name.

Dependencies

To create this parameter, on the Configuration tab, select Fuel.

Fuel table.

Dependencies

To create this parameter, on the Configuration tab, select Fuel.

Temperature

Temperature output port name.

Dependencies

To create this parameter, on the Configuration tab, select Temperature.

Temperature table.

Dependencies

To create this parameter, on the Configuration tab, select Temperature.

Efficiency

Efficiency output port name.

Dependencies

To create this parameter, on the Configuration tab, select Efficiency.

Efficiency table.

Dependencies

To create this parameter, on the Configuration tab, select Efficiency.

HC

Hydrocarbon output port name.

Dependencies

To create this parameter, on the Configuration tab, select HC.

Hydrocarbon table.

Dependencies

To create this parameter, on the Configuration tab, select HC.

CO

Carbon monoxide output port name.

Dependencies

To create this parameter, on the Configuration tab, select CO.

Carbon dioxide table.

Dependencies

To create this parameter, on the Configuration tab, select CO.

NOx

NOx output port name. NOx is nitric oxide NO and nitrogen dioxide NO2.

Dependencies

To create this parameter, on the Configuration tab, select NOx.

NOx emissions table. NOx is nitric oxide NO and nitrogen dioxide NO2.

Dependencies

To create this parameter, on the Configuration tab, select NOx.

CO2

Carbon dioxide output port name.

Dependencies

To create this parameter, on the Configuration tab, select CO2.

Carbon dioxide table.

Dependencies

To create this parameter, on the Configuration tab, select CO2.

PM

Particulate matter output port name.

Dependencies

To create this parameter, on the Configuration tab, select PM.

Particulate matter table.

Dependencies

To create this parameter, on the Configuration tab, select PM.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2017a

See Also

|